export {};

// let num: any = 10;
// num = "str";
// num.toFixed();

// typeScript提供类型保护  ----》 any类型，失去了类型保护   ------》  javascript

// let age: any
let age;

const fn = (a: any) => {
  console.log(a);
};

let num: any = 10;
num = "str";
